William Mayfield, 66, was found Saturday unresponsive in his cell at the Hinds County Detention Center, authorities said. Mayfield was taken to the University of Mississippi Medical Center suffering from renal failure, county officials said.

Mayfield's condition was not immediately known.

Mayfield, a retired ophthalmologist, was arrested April 30 and charged with murder. Police said they found 67-year-old Susan Mayfield suffering from a shotgun wound to the stomach at the couple's home on St. Andrews Drive. She was taken to a local hospital, where she later died.

Family members said William Mayfield suffers from Parkinson's disease and the medication he takes can cause him to become confused and paranoid.